hard fork

What is a hard fork?
Hard fork (from English. a hard fork is a change in the rules of the blockchain that invalidates all transactions made after this change. This can split the network into two separate chains: the old chain and the new chain. To understand how a hard fork works, imagine a road with two directions of traffic. If there is an accident or repair on this road, traffic on it stops, and drivers have to look for alternative routes. In the case of a blockchain, when a hard fork occurs, the old chain
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